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Hi Tom, I’ve updated the links on the page to the attachments. Also,
here is the correct link to the page. The one you gave below is to the
conference call minutes: ~~~~~~~~~~~~~~~~~~~ Jon Dettling 734-274-5183 dettling@glc.org From: Tom Velalis
[mailto:tom.velalis@epa.state.oh.us] Steering Committee The emission factors
comparison spreadsheets are now revised with more records for each
pollutant. The additional
records are from shown in the Formula column of each worksheet. The summary is
revised slightly to account for changes and the tables are included
at the same link. Jon , please update
the links from the document to the attachments. In the meantime, you can
still view the seven
attachments by clicking on the attachments navigation button. For people who care
for statistics: All WebFire Emission
Factors 26339 Uncontrolled and
Unrevoked CAP and HAP Emission Factors 9839 Unconrolled and
Unrevoked emission factors under evaluation 4581 (factors that belong to
SCC groups) All WebFire
Controlled factors 7606 WebFire Misc Control
Devices factors 3126 I have not yet developed
an approach to compare the Controlled factors. Those
factors will need to be evaluated in a
manner similar to the uncontrolled factors. SCCs with missing
uncontrolled factors can potentially get
filled in with a conservative controlled factor. More discussion is
needed in the second phase of the project. Feel free to call me
with questions. Tom V 614-644-4837
Steering Committee, Some notes from yesterday’s call are up at: Please note that March 26-27 was selected for the next meeting
and it will be in Chicago. Also, Tom has put together the excellent summary below of where
things stand with the emission factor discussion . The attachments are included
at the following link. Please review and provide comments. Jon ~~~~~~~~~~~~~~~~~~~ Jon Dettling 734-274-5183 dettling@glc.org From: Tom Velalis
[mailto:tom.velalis@epa.state.oh.us] Evaluation
of WebFire Uncontrolled Emission Factors Purpose:
Evaluate Uncontrolled WebFire Emission Factors In last conference
call, we had the opportunity to review the assumptions applied in the
processing of the WebFire records and discuss the steps for producing emissions
factors data sets for evaluation. The participating States agreed to
review the questionable emission factors, draw conclusions and make
recommendations. Processing
Steps The main processing
steps are outlined below:
Data Sets The following Data
sets are produced for evaluation:
Cursory
Review Each of the sets is
a listing of emission factors that belong to the same groups. In other
words, the emission factors that share the same material on column H belong to
the same group. A visual evaluation of the numeric values, within each
group, is needed to identify possible outliers. For each data set, visual
evaluation is performed and questionable records are highlighted in yellow.
Each worksheet name with questionable records is also highlighted in
yellow. In most cases, an outlier is a value that is different to another
value within the same group by a factor of 10. One exception is
the listing of the PM formulas and VOC formulas. Since there are few
formulas in Webfire, it is necessary to evaluate all of them. The SCC
Groups concept is not applied to those records. For illustration
purposes, the formulas are only grouped by processed
material. States are
encouraged to go over each worksheet and confirm the highlighted records.
An alternative scenario is to only review the existing highlighted
records. It should take no more than 2-3 hours to go over the
records. Preliminary
Conclusions
State’s
Evaluation and Review This is not a
mandatory assignment to the States. However, State’s participation is
important for the success of this evaluation. Each State is encouraged to
review each worksheet and confirm the identification of questionable
records. If time is a factor, States can review only the identified
records, yellow highlighted records. The hope is that an agreement can be
reached and conclude which factors are bad for inventories. What’s Next On next conference
call, there will be a discussion on this review. Begin to compile a
listing of bad emission factors and a list of alternative values. Begin Gap Filling
discussion Attachments: Priority_Pollutant_List64_VOC_HAPs.xls Priority_Pollutant_List64_PM_HAPs.xls Priority_Pollutant_List64_PAHs.xls Priority_Pollutant_List64_MISC-HAPs.xls Priority_Criteria_Pollutant_EMISSION
FACTOR AND FORMULAs.xls |